Παραπομπή APA

González Ballar, R. (2014). The Payment for Environmental Services in Costa Rica.

Παραπομπή Chicago Style

González Ballar, Rafael. The Payment for Environmental Services in Costa Rica. 2014.

Παραπομπή MLA

González Ballar, Rafael. The Payment for Environmental Services in Costa Rica. 2014.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.